OFFSET
1,2
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..11
EXAMPLE
Some solutions for n=4
..0..2..1..3....2..2..3..3....2..2..3..3....2..0..1..2....2..0..3..2
..2..0..0..2....2..0..2..1....2..0..3..3....0..0..2..3....0..2..1..0
..1..0..0..1....3..2..1..3....3..3..2..1....1..2..1..1....3..1..3..2
..3..2..1..0....3..1..3..1....3..3..1..3....2..3..1..0....2..0..2..3
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 31 2012
STATUS
approved